JP4337969B2

JP4337969B2 - Structure of rotary cooling roller

Info

Publication number: JP4337969B2
Application number: JP2002276982A
Authority: JP
Inventors: 政秀岡本
Original assignee: Sasakura Engineering Co Ltd
Current assignee: Sasakura Engineering Co Ltd
Priority date: 2002-09-24
Filing date: 2002-09-24
Publication date: 2009-09-30
Anticipated expiration: 2022-09-24
Also published as: JP2004116548A

Description

【０００１】
【発明の属する技術分野】
本発明は，セロファン，アルミ箔，紙，合成樹脂等の各種シートや各種フィルムの製造装置，または，これら各種シートや各種フィルムの加工装置，あるいは，これら各種シートや各種フィルムのうち同種又は異種の複数枚を貼合又は積層するラミネート装置，若しくは，前記各種のシートや各種フィルムに対して合成樹脂をフィルム状に押し出しながら貼合わせる押出ラミネート装置等に使用される回転式冷却ローラの構造に関するものである。
【０００２】
【従来の技術】
一般に，例えば，紙に対して合成樹脂フィルムを貼合したラミネート積層紙の製造に際しては，図１に示すように，ロール状原紙１から繰り出された原料紙２を，一対の回転式押圧ローラ３と回転式冷却ローラ４との間を通したのち，巻き取りロール５に巻き取らせる一方，前記回転式押圧ローラ３と回転冷却ローラ４との間の上部に，樹脂ホルダー６ａ内の溶融合成樹脂７をフィルム状に押し出すようにした押し出しダイス６ｂを配設し，この押し出しダイス６ｂから押し出される合成樹脂フィルム８を，前記原料紙２と一緒に回転式押圧ローラ３と回転式冷却ローラ４との間に送り込むことにより，この合成樹脂フィルム８を，回転式冷却ローラ４にて冷却しながら前記原料紙２に貼合わせて，ラミネート積層紙９を製造するという方法が採用されている。
【０００３】
従来，この製造方法に使用する回転式冷却ローラ４は，特許文献１に記載され，且つ，図２に示すように構成している。
【０００４】
すなわち，円筒体１１内の両端部に，当該円筒体１１内を密封する面板１２，１３を固着し，この円筒体１１を，前記両面板１２，１３の中心から外向きに突出した中空支持軸１４，１５にて回転自在に軸支する一方，前記円筒体１１内における一端部に冷却水等の冷却流体を前記一方の中空支持軸１４から導入する入り口室１６を，他端部に前記冷却流体を前記他方の中空の支持軸１５に流出する出口室１７を，これら入り口室１６及び出口室１７の一部を前記円筒体１１と前記面板１２，１３との両方にて形成するか，或いは，前記面板１２，１３にて形成するように設け，更に，前記円筒体１１の内部に，蒸発と凝縮とを繰り返す作動流体を充填すると共に，内部を前記入り口室１６から前記出口室１５に向かって流れる冷却流体によって前記作動流体を間接的に冷却するようにした多数本の伝熱管１８を設け，前記円筒体１１内における作動流体の蒸発と凝縮との繰り返しにて前記円筒体１１の表面を冷却するという構成にしている。
【０００５】
また，別の特許文献２は，前記と略同じ構造の回転式冷却ローラにおいて，その入り口室及び出口室の一部を，前記円筒体内の両端を密封するための面板にて形成するという構成にしている。
【０００６】
【特許文献１】
特公平４−２７２０号公報
【特許文献２】
特開２００１−１５９４１９号公報
【０００７】
【発明が解決しようとする課題】
しかし，前記従来における回転式冷却ローラ４は，円筒体１１内の両端部における冷却水等の冷却流体の入り口室１６及び出口室１７の一部を，前記したように，前記円筒体１１と前記面板１２，１３との両方にて形成するか，或いは前記面板にて形成するというように，換言すると，当該入り口室１６及び出口室１７の一部が，前記円筒体１１の内面と前記面板１２，１３の内面との両方に直接的に接するか，前記面板の内面に直接的に接するように構成にしていることにより，以下に述べるような問題があった。
【０００８】
すなわち，この回転式冷却ローラ４においては，その全長寸法を，その円筒体１１における外周面に対して接触することで冷却する前記原料紙２等の被冷却シートにおける幅寸法より長くすることにより，前記原料紙２等の被冷却シートを前記円筒体１１の全長にわたって接触することなく，両端の部分に前記被冷却シートを接触させない非接触外周面を残し，この両非接触外周面よりも内側の部分に対して前記被冷却シートを接触するようにしている。
【０００９】
このために，前記特許文献１のように，前記円筒体１１内の両端部に設ける入り口室１６及び出口室１７が，その一部が前記円筒体１１の内面と前記面板１２，１３の内面との両方に対して直接的に接するような構成であると，前記円筒体１１における外周面のうち両端における被冷却シートに対する非接触外周面の部分が，円筒体１１内に封入した作動流体によって冷却されることなく，冷却水等の冷却流体によって直接的に冷やされることになって，この非接触外周面の部分における表面温度が，前記被冷却シートが接触する外周面の部分における表面温度よりも低くなり，特に，前記冷却流体に対する入り口室１６側における非接触外周面の部分の表面温度がより低くなるから，この非接触外周面の部分に結露が発生して，この結露が，ラミネートを阻害することになる。
【００１０】
また，前記冷却流体における入り口室１６への入り口温度と出口室１７からの出口温度との温度差を小さくした場合には，前記冷却流体に対する出口室１７側における非接触外周面の部分における表面にも結露が発生するのである。
【００１１】
一方，前記特許文献２のように，前記入り口室及び出口室の一部が，両面板の内面に直接的に接するような構成である場合には，前記円筒体における外周面のうち両端における被冷却シートに対する非接触外周面の部分が，両面板を介しての冷却流体への熱伝達によって前記被冷却シートが接触する外周面の部分よりも低い表面温度になるように冷却されるから，前記と同様に，前記円筒体における外周面のうち冷却流体の入り口室側における非接触外周面の部分の表面に結露が発生するのである。
【００１２】
また，この場合においても，前記冷却流体における入り口室への入り口温度と出口室からの出口温度との温度差を小さくしたときには，前記冷却流体に対する出口室側における非接触外周面の部分の表面にも結露が発生する。
【００１３】
これに加えて，前記した従来の回転式冷却ローラ４においては，いずれも，その両端の支持軸１４，１５を中空にして，その内部に，前記冷却水等の冷却流体を直接的に流すように構成していることにより，この中空支持軸１４，１５は，その内部を流れる冷却流体の温度まで下がることになるから，前記中空支持軸１４，１５のうち前記入り口室１６側に対する中空支持軸１４の表面に，結露が発生するのであり，また，前記冷却流体における入り口室１６への入り口温度と出口室１７からの出口温度との温度差を小さくしたときには，前記中空支持軸１４，１５のうち前記出口室１７側に対する中空支持軸１５の表面にも結露が発生する。
【００１４】
本発明は，このような結露の発生を確実に抑制することを技術的課題とするものである。
【００１５】
【課題を解決するための手段】
この技術的課題を達成するため本発明の請求項１は，
「外周面に被冷却シートが接触する円筒体と，この円筒体内の両端を塞ぐ面板から突出する中空支持軸とを備え，前記円筒体の内部に，蒸発と凝縮とを繰り返す作動流体を充填すると共に，一端に前記一方の中空支持軸からの冷却流体の入り口室を他端に前記他方の中空支持軸への前記冷却流体の出口室を備え且つ内部を前記入り口室から出口室に流れる前記冷却流体にて前記作動流体を間接冷却するようにした間接熱交換型の伝熱体を設けて成る回転式冷却ローラにおいて，
前記冷却流体に対する入り口室及び出口室のうち少なくとも入り口室の外周と，前記円筒体の内周との間に，空隙部を，当該空隙部内に前記作動流体を導入するように設けて，この空隙部を，当該空隙部内に導入する作動流体が前記面板の全面に対して直接的に接触するように構成し，更に，前記両中空支持軸のうち少なくとも前記入り口室側における中空支持軸内に，冷却流体の輸送管を，当該輸送管の外周面と前記中空支持軸の内周面との間に前記空隙部及び前記輸送管内とは中空支持軸の全長にわたって非連通の隙間を形成するように挿入して，前記中空支持軸がその内部の輸送管内を流れる冷却流体によって冷却されることを前記隙間にて低減できるように構成した。」
ことを特徴としている。
【００１６】
また，本発明の請求項２は，
「外周面に被冷却シートが接触する円筒体と，この円筒体内の両端を塞ぐ面板から突出する中空支持軸とを備え，前記円筒体の内部に，蒸発と凝縮とを繰り返す作動流体を充填すると共に，一端に前記一方の中空支持軸からの冷却流体の入り口室を他端に前記他方の中空支持軸への前記冷却流体の出口室を備え且つ内部を前記入り口室から出口室に流れる前記冷却流体にて前記作動流体を間接冷却するようにした間接熱交換型の伝熱体を設けて成る回転式冷却ローラにおいて，
前記冷却流体に対する入り口室及び出口室の外周と，前記円筒対の内周との間に，空隙部を，当該空隙部内に前記作動流体を導入するように各々設けて，この空隙部を，当該空隙部内に導入する作動流体が前記両面板の全面に対して直接的に接触するように構成し，更に，前記両中空支持軸内に，冷却流体の輸送管を，当該輸送管の外周面と前記中空支持軸の内周面との間に前記空隙部及び前記輸送管内とは中空支持軸の全長にわたって非連通の隙間を形成するように各々挿入して，前記両中空支持軸がその内部の輸送管内を流れる冷却流体によって冷却されることを前記隙間にて低減できるように構成した。」
ことを特徴としている。
【００１７】
更にまた，本発明の請求項３は，
「前記請求項１又は２の記載において，前記隙間内に断熱材を充填した。」
ことを特徴としている。
【００１８】
【発明の作用・効果】
前記請求項１に記載したように，冷却流体に対する入り口室及び出口室のうち少なくとも入り口室の外周と，前記円筒体の内周との間に，空隙部を，当該空隙部内に前記作動流体を導入するように設けたことにより，前記円筒体の両端における被冷却シートに対する非接触外周面の部分のうち，冷却流体に対する入り口室側における非接触外周面の部分は，前記入り口室の外周の空隙部の存在により入り口室内における冷却流体にて直接的に冷却されることなく，前記空隙部内においても作動流体が蒸発と凝縮とを繰り返すことで冷却されることになり，前記非接触外周面の部分における表面温度は，前記円筒体における外周面のうち前記被冷却シートが接触する部分における表面温度に近づくことになるから，前記冷却流体に対する入り口室側における非接触外周面の部分の表面に結露が発生することを確実に低減できるのである。勿論，この請求項１の構成を，冷却流体に対する出口室側に対しても適用することにより，前記円筒体の両端における非接触外周面の部分の両方における結露の発生を確実に低減できる。
【００１９】
また，請求項１に記載したように，前記空隙部を，当該空隙部内に導入する作動流体が前記面板の全面に対して直接的に接触するように構成したことにより，円筒体の熱が面板を介して入り口室内の冷却流体に伝わること，換言すると，前記面板を介しての円筒体から冷却流体への熱伝達を，前記空隙部内に流入する作動流体が前記面板に対して接触することで低減できるから，前記した効果，前記冷却流体に対する入り口室側における非接触外周面の部分の表面における結露の発生低減を更に助長できる。
しかも，請求項１は，前記両中空支持軸のうち少なくとも前記入り口室側における中空支持軸内に，冷却流体の輸送管を，当該輸送管の外周面と前記中空支持軸の内周面との間に前記空隙部及び前記輸送管内とは中空支持軸の全長にわたって非連通の隙間を形成するように挿入して，前記中空支持軸がその内部の輸送管内を流れる冷却流体によって冷却されることを前記隙間にて低減できるように構成したことにより，冷却流体の入り口室側における中空支持軸が，その内部を流れる冷却流体によって冷却されることを低減できて，前記入り口室側における中空支持軸の温度が，冷却流体の温度まで下がることを防止できるから，この中空支持軸の表面に結露が発生することを確実に低減できるのである。
【００２０】
次に，請求項２は，前記請求項１の記載を，回転式冷却ローラの両端に対して適用した場合であり，これによると，前記円筒体の両端における非接触外周面の部分の両方における結露の発生を確実に低減できるとともに，両方の中空支持軸に結露が発生することを確実に低減できる。
【００２１】
【発明の実施の形態】
以下，本発明の実施の形態を図面について説明する。
【００２２】
図３〜図５は，第１の実施の形態を示す。
【００２３】
この第１の実施の形態における回転式冷却ローラ４０は，前記図１に示す原料紙２等の被冷却シートが外周面に接触する円筒体２１を備え，この円筒体２１における両端内には，その内部を密閉するように面板２２，２３が固着され，且つ，この円筒体２１の内部には，ナフタリン又はキノリン等のように蒸発と凝縮とを繰り返す作動流体が充填されている。
【００２４】
前記両面板２２，２３の中心には，前記円筒体２１の両端に対する中空支持軸２４，２５が，前記両面板２２，２３を貫通して外向き及び内向きに突出するように固着され，この両中空支持軸２４，２５のうち面板２２，２３から外向きに突出する部分に，前記円筒体２１の両端を回転自在に軸支するためのジャーナル部２４′，２５′が設けられている。
【００２５】
なお，本実施の形態の場合，前記両中空支持軸２４，２５は，一本の直線軸に連なった構成にしている。
【００２６】
前記円筒体２１の内部には，一端に前記一方の中空支持軸２４からの冷却流体の入り口室２６を他端に前記他方の中空支持軸２５への前記冷却流体の出口室２７を備え且つ内部を前記入り口室２６から出口室２７に流れる前記冷却流体にて前記作動流体を間接冷却するようにした間接熱交換型の伝熱体２８が設けられている。
【００２７】
すなわち，前記両中空支持軸２４，２５のうち一方の中空支持軸２４には，その前記円筒体２１内への突出端２４″に前記入り口室２６が形成される一方，前記他方の中空支持軸２５には，その前記円筒体２１内への突出端２５″に前記出口室２７が形成され，前記入り口室２６と，前記出口室２７との間には，前記間接熱交換型の伝熱体２８としての伝熱管２８′の多数本が同心円に沿って並ぶように装架されている。
【００２８】
そして，前記入り口室２６及び出口室２７を，前記円筒体２１における内径よりも小径にするとともに，これらを入り口室２６及び出口室２７を，前記円筒体２１内の両端を塞ぐ面板２２，２３より内向きに適宜距離Ｌだけ離れた部位に位置することにより，前記入り口室２６及び出口室２７における外周と，前記円筒体２１の内周との間に，前記入り口室２６及び出口室２７の周囲を囲うように環状にした空隙部２９，３０を，当該空隙部２９，３０が前記面板２２，２３の内面にまで達するように形成して，この空隙部２９，３０内にも，前記円筒体２１内に充填した作動流体が前記面板２２，２３の全面に直接的に接触するように導入するという構成にする。
【００２９】
前記一方の中空支持軸２４の内部に，前記入り口室２６内に冷却水等の冷却流体を導入するための輸送管３１を，当該輸送管３１の外周と前記中空支持軸２４の内面との間に，前記空隙部２９及び前記輸送管３１内とは中空支持軸２４の全長にわたって非連通に構成した隙間３２を形成するように挿入して，前記中空支持軸２４がその内部の輸送管３１内を流れる冷却流体によって冷却されることを前記隙間３２にて低減できるように構成する一方，前記他方の中空支持軸２５の内部に，前記出口室２７内の冷却水等の冷却流体を排出するための輸送管３３を，当該輸送管３３の外周と前記中空支持軸２５の内面との間に，前記空隙部３０及び前記輸送管３３内とは中空支持軸２５の全長にわたって非連通に構成した隙間３４を形成するように挿入して，前記中空支持軸２５がその内部の輸送管３３内を流れる冷却流体によって冷却されることを前記隙間３４にて低減できるように構成する。なお，前記隙間３２，３４の終端部には，シール用のＯリング３５が装着されている。
【００３０】
この構成において，前記円筒体２１内に充填した作動流体は，円筒体２１の内面に接したとき，この円筒体２１の外周面に接触する被冷却シートからの熱にて蒸発し，各伝熱管２８′への接触にて冷却・凝縮して液化して，前記円筒体２１の内面に至ってこれに接することを繰り返すことにより，前記被冷却シートの冷却を行う。
【００３１】
この場合において，前記各伝熱管２８′の一端の入り口室２６及び出口室２７の外周と，前記円筒体２１の内周との間には空隙部２９，３０が形成され，前記作動流体が，この空隙部２９，３０内においても蒸発と凝縮とを繰り返すことにより，前記円筒体２１の両端における被冷却シートに対する非接触外周面の部分が，前記入り口室２６内における冷却流体及び前記出口室２７内における冷却流体にて直接的に冷却されることなく，前記作動流体にて冷却されることになるから，この両端における非接触外周面の部分の表面温度を，前記円筒体２１における外周面のうち前記被冷却シートが接触する部分における表面温度に近づけることができる。
【００３２】
また，前記空隙部２９，３０内で蒸発と凝縮とを繰り返す作動流体は，前記円筒体２１内の両端を密閉する面板２２，２３の全面に直接的に接触することにより，前記面板２２，２３を介しての冷却流体への熱伝達を低減するから，前記両端における非接触外周面の部分の表面温度を，被冷却シートが接触する部分における表面温度に更に近づけることができる。
【００３３】
更にまた，前記入り口室２６内に流入する冷却流体，及び前記出口室２７内から流出する冷却流体は，前記両中空支持軸２４，２５内に，当該中空支持軸２４，２５の内面との間に中空支持軸２４，２５の全長にわたって隙間３２，３４を形成するように挿入した輸送管３１，３３内を流れることにより，前記両中空支持軸２４，２５が，その内部を流れる冷却流体によって冷却されることを，前記隙間３２，３４の存在にて低減できるから，前記両中空支持軸２４，２５の温度が，冷却流体の温度まで下がることを防止できる。
【００３４】
なお，前記隙間３２，３４内に，ガラスウール等の断熱材を充填するという構成にしても良い。
【００３５】
次に，図６は，第２の実施の形態を示す。
【００３６】
この第２の実施の形態における回転式冷却ローラ２０ａは，前記第１の実施の形態と略同様に，被冷却シートが外周面に接触する円筒体２１ａを備え，この円筒体２１ａにおける両端内にその内部を密閉するように固着した面板２２ａ，２３ａの中心には，中空支持軸２４ａ，２５ａが，前記両面板２２，２３を貫通して外向き及び内向きに突出するように固着され，また，前記円筒体２１ａの内部には，ナフタリン又はキノリン等のように蒸発と凝縮とを繰り返す作動流体が充填されている。
【００３７】
また，前記円筒体２１ａの内部には，前記両中空支持軸２４ａ，２５ａの円筒体２１ａ内への突出端２４ａ″，２５ａ″の間に，一端に前記一方の中空支持軸２４ａからの冷却流体の入り口室２６ａを他端に前記他方の中空支持軸２５ａへの前記冷却流体の出口室２７ａを備え且つ内部を前記入り口室２６ａから出口室２７ａに流れる前記冷却流体にて前記作動流体を間接冷却するようにした間接熱交換型の伝熱体２８ａが設けられている。
【００３８】
この第２の実施の形態においては，前記間接熱交換型の伝熱体２８ａを，外管２８ａ′と，その内部に挿入した内管２８ａ″とによって，その間に冷却流体の流れ通路３６を形成した構成にしている。
【００３９】
この第２の実施の形態の回転式冷却ローラ２０ａにおいても，前記第１の実施の形態と同様に，前記入り口室２６ａ及び出口室２７ａを，前記円筒体２１ａの内径Ｄ０よりも小径にするとともに，これらを入り口室２６ａ及び出口室２７ａを，前記円筒体２１ａ内の両端を塞ぐ面板２２ａ，２３ａより内向きに適宜距離Ｌだけ離れた部位に位置することにより，前記入り口室２６ａ及び出口室２７ａにおける外周と，前記円筒体２１ａの内周との間に，前記入り口室２６ａ及び出口室２７ａの周囲を囲うように環状にした空隙部２９ａ，３０ａを，当該空隙部２９ａ，３０ａが前記面板２２ａ，２３ａの内面にまで達するように形成して，この空隙部２９ａ，３０ａ内にも，前記円筒体２１ａ内に充填した作動流体が前記面板２２ａ，２３ａの全面に直接的に接触するように導入するという構成にする。
【００４０】
これに加えて，前記一方の中空支持軸２４ａの内部に，前記入り口室２６ａ内に冷却水等の冷却流体を導入するための輸送管３１ａを，当該輸送管３１ａの外周と前記中空支持軸２４ａの内面との間に，前記空隙部２９ａ及び前記輸送管３１ａ内とは中空支持軸２４ａの全長にわたって非連通に構成した隙間３２ａを形成するように挿入して，前記中空支持軸２４ａがその内部の輸送管３１ａ内を流れる冷却流体によって冷却されることを前記隙間３２ａにて低減できるように構成する一方，前記他方の中空支持軸２５ａの内部に，前記出口室２７ａ内の冷却水等の冷却流体を排出するための輸送管３３ａを，当該輸送管３３ａの外周と前記中空支持軸２５ａの内面との間に，前記空隙部３０ａ及び前記輸送管３３ａ内とは中空支持軸２５ａの全長にわたって非連通に構成した隙間３４ａを形成するように挿入して，前記中空支持軸２５ａがその内部の輸送管３３ａ内を流れる冷却流体によって冷却されることを前記隙間３４ａにて低減できるように構成する。
【００４１】
この第２の実施の形態においても，前記作動流体が，前記入り口室２６ａ及び出口室２７の外周を囲う空隙部２９ａ，３０ａ内において蒸発と凝縮とを繰り返すことにより，前記円筒体２１ａから入り口室２６ａ内及び出口室２７ａ内における冷却流体への直接的な熱伝達を低減できる一方，前記両中空支持軸２４，２５が，その内部を流れる冷却流体によって冷却されることを，前記隙間３２，３４の存在にて低減できるから，前記第１の実施の形態と同様の効果を有する。
【００４２】
また，この第２の実施の形態においても，前記両中空支持軸２４，２５とその内部に挿入した輸送管３１ａ，３３ａとの間の隙間３２ａ，３４ａ内に，ガラスウール等の断熱材を充填するという構成にしても良い。また，この第２の実施の形態においては，前記伝熱体２８ａにおける内管２８ａ″の外周面に，螺旋状の突起３７を設ける一方，外管２８ａ′の外周面にフィン３８を設けることにより，伝熱性を向上するように構成している。
【００４３】
なお，前記した各実施の形態は，入り口室２６，２６ａ側と出口室２７，２７ａ側の両方の各々に対して，空隙部２９，２９ａ，３０，３０ａを形成することに加えて，両中空支持軸２４，２４ａ，２５，２５ａの各々に対して輸送管３１，３１ａ，３３，３３ａを挿入する場合であったが，前記円筒体２１，２１ａ及びその中空支持軸２４，２４ａ，２５，２５ａに発生する結露は，主として，冷却流体の温度が低い入り口側に発生することから，結露の発生が入り口側に限られる場合には，この入り口側にのみ前記空隙部２９，２９ａ及び輸送管３１，３１ａを設けるという構成にすれば良い。
【００４４】
また，冷却流体における入り口側と出口側との間における温度差が小さいことにより，結露が入り口側と出口側との両方に発生するおそれがある場合には，前記した各実施の形態にように，両端に対して適用するという構成にすれば良いのである。
【図面の簡単な説明】
【図１】ラミネート積層紙の製造装置の概略図である。
【図２】従来における回転式冷却ローラを示す縦断正面図である。
【図３】本発明における第１の実施の形態による回転式冷却ローラを示す縦断正面図である。
【図４】図３のＩＶ−ＩＶ視断面図である。
【図５】図３の要部拡大図である。
【図６】本発明における第２の実施の形態による回転式冷却ローラを示す縦断正面図である。
【符号の説明】
４０，４０ａ回転式冷却ローラ
２１，２１ａ円筒体
２２，２２ａ，２３，２３ａ面板
２４，２４ａ，２５，２５ａ中空支持軸
２６，２６ａ入り口室
２７，２７ａ出口室
２８，２８ａ伝熱体
２９，２９ａ，３０，３０ａ空隙部
３１，３１ａ，３３，３３ａ輸送管
３２，３２ａ，３４，３４ａ隙間[0001]
BACKGROUND OF THE INVENTION
The present invention is a manufacturing apparatus for various sheets and various films such as cellophane, aluminum foil, paper, and synthetic resin, a processing apparatus for these various sheets and various films, or the same or different types of these various sheets and various films. It relates to the structure of a rotary cooling roller used in a laminating device for laminating or laminating a plurality of sheets, or an extruding laminating device for laminating synthetic resins to the various sheets and various films while extruding them in the form of a film. is there.
[0002]
[Prior art]
In general, for example, in the production of laminated laminated paper in which a synthetic resin film is bonded to paper, as shown in FIG. 1, raw paper 2 fed out from a roll base paper 1 is used as a pair of rotary pressing rollers 3. Is passed between the rotary cooling roller 4 and wound on the take-up roll 5, while the molten synthetic resin in the resin holder 6 a is placed on the upper part between the rotary press roller 3 and the rotary cooling roller 4. An extrusion die 6b is arranged so as to extrude 7 in the form of a film, and the synthetic resin film 8 extruded from the extrusion die 6b is attached to the rotary pressing roller 3 and the rotary cooling roller 4 together with the raw paper 2. A method of manufacturing a laminated laminated paper 9 by laminating the synthetic resin film 8 to the raw paper 2 while being cooled by a rotary cooling roller 4 It has been adopted.
[0003]
Conventionally, the rotary cooling roller 4 used in this manufacturing method is described in Patent Document 1 and is configured as shown in FIG.
[0004]
That is, face plates 12 and 13 for sealing the inside of the cylindrical body 11 are fixed to both ends of the cylindrical body 11, and the cylindrical body 11 is protruded outward from the center of the double-sided plates 12 and 13. 14 and 15 are rotatably supported, while an inlet chamber 16 for introducing a cooling fluid such as cooling water from the one hollow support shaft 14 to one end portion in the cylindrical body 11 and the cooling portion to the other end portion. An outlet chamber 17 through which fluid flows out to the other hollow support shaft 15, and a part of the inlet chamber 16 and the outlet chamber 17 is formed by both the cylindrical body 11 and the face plates 12, 13, or The cylindrical body 11 is filled with a working fluid that repeats evaporation and condensation, and the interior is directed from the inlet chamber 16 to the outlet chamber 15. Due to the flowing cooling fluid A plurality of heat transfer tubes 18 configured to indirectly cool the working fluid, and the surface of the cylindrical body 11 is cooled by repeated evaporation and condensation of the working fluid in the cylindrical body 11. I have to.
[0005]
Another patent document 2 has a structure in which a part of the entrance chamber and the exit chamber is formed by face plates for sealing both ends of the cylindrical body in a rotary cooling roller having substantially the same structure as described above. ing.
[0006]
[Patent Document 1]
Japanese Patent Publication No.4-2720 [Patent Document 2]
JP 2001-159419 A
[Problems to be solved by the invention]
However, the conventional rotary cooling roller 4 has a part of the inlet chamber 16 and the outlet chamber 17 for cooling fluid such as cooling water at both ends in the cylindrical body 11 as described above. In other words, a part of the entrance chamber 16 and the exit chamber 17 is formed by both the face plates 12 and 13 or by the face plate. , 13 is in direct contact with both of the inner surfaces or the inner surface of the face plate, thereby causing the following problems.
[0008]
That is, in the rotary cooling roller 4, the overall length is made longer than the width of the sheet to be cooled such as the raw paper 2 that is cooled by contacting the outer peripheral surface of the cylindrical body 11. Without contacting the sheet to be cooled such as the raw paper 2 over the entire length of the cylindrical body 11, the non-contact outer peripheral surface that does not contact the sheet to be cooled is left at both ends, and the inner side of both non-contact outer peripheral surfaces. The sheet to be cooled is brought into contact with the portion.
[0009]
Therefore, as in Patent Document 1, an entrance chamber 16 and an exit chamber 17 provided at both ends of the cylindrical body 11 are partially formed on the inner surface of the cylindrical body 11 and the inner surfaces of the face plates 12 and 13. If the configuration is such that both of the outer peripheral surfaces of the cylindrical body 11 are in direct contact with each other, the portions of the non-contact outer peripheral surface with respect to the sheet to be cooled at both ends are cooled by the working fluid sealed in the cylindrical body 11. Therefore, the surface temperature at the non-contact outer peripheral surface portion is lower than the surface temperature at the outer peripheral surface portion in contact with the sheet to be cooled. In particular, since the surface temperature of the non-contact outer peripheral surface portion on the inlet chamber 16 side with respect to the cooling fluid becomes lower, dew condensation occurs on the non-contact outer peripheral surface portion. It will inhibit the laminate.
[0010]
When the temperature difference between the inlet temperature to the inlet chamber 16 and the outlet temperature from the outlet chamber 17 in the cooling fluid is reduced, the surface of the non-contact outer peripheral surface on the outlet chamber 17 side with respect to the cooling fluid Condensation also occurs.
[0011]
On the other hand, as in Patent Document 2, in the case where a part of the entrance chamber and the exit chamber are in direct contact with the inner surface of the double-sided plate, the covering at both ends of the outer peripheral surface of the cylindrical body is performed. The portion of the non-contact outer peripheral surface with respect to the cooling sheet is cooled so as to have a lower surface temperature than the portion of the outer peripheral surface with which the sheet to be cooled comes into contact by heat transfer to the cooling fluid via the double-sided plate. Similarly, dew condensation occurs on the surface of the non-contact outer peripheral surface of the cooling fluid on the inlet chamber side in the outer peripheral surface of the cylindrical body.
[0012]
Also in this case, when the temperature difference between the inlet temperature to the inlet chamber and the outlet temperature from the outlet chamber in the cooling fluid is reduced, the surface of the non-contact outer peripheral surface on the outlet chamber side with respect to the cooling fluid Also condensation occurs.
[0013]
In addition to this, in each of the conventional rotary cooling rollers 4 described above, the support shafts 14 and 15 at both ends thereof are made hollow so that the cooling fluid such as the cooling water flows directly into the inside thereof. Since the hollow support shafts 14 and 15 are lowered to the temperature of the cooling fluid flowing through the hollow support shafts 14 and 15, the hollow support shafts with respect to the inlet chamber 16 side of the hollow support shafts 14 and 15. When the temperature difference between the inlet temperature to the inlet chamber 16 and the outlet temperature from the outlet chamber 17 in the cooling fluid is reduced, the hollow support shafts 14, 15 Of these, condensation also occurs on the surface of the hollow support shaft 15 with respect to the outlet chamber 17 side.
[0014]
An object of the present invention is to reliably suppress the occurrence of such condensation.
[0015]
[Means for Solving the Problems]
In order to achieve this technical problem, claim 1 of the present invention provides:
“A cylindrical body whose outer surface is in contact with the sheet to be cooled and a hollow support shaft protruding from a face plate that closes both ends of the cylindrical body, and the inside of the cylindrical body is filled with a working fluid that repeats evaporation and condensation. The cooling fluid inlet chamber from the one hollow support shaft is provided at one end, and the cooling fluid outlet chamber to the other hollow support shaft is provided at the other end, and the cooling flows through the interior from the inlet chamber to the outlet chamber. A rotary cooling roller provided with an indirect heat exchange type heat transfer body configured to indirectly cool the working fluid with a fluid;
A gap is provided between at least the outer circumference of the inlet chamber and the inner circumference of the cylindrical body of the inlet chamber and the outlet chamber for the cooling fluid so as to introduce the working fluid into the gap. The working fluid introduced into the gap is in direct contact with the entire surface of the face plate, and further, in the hollow support shaft at least on the inlet chamber side of the both hollow support shafts, A cooling fluid transport pipe is formed between the outer peripheral surface of the transport pipe and the inner peripheral surface of the hollow support shaft so as to form a non-communication gap between the gap and the transport pipe over the entire length of the hollow support shaft. The hollow support shaft is inserted so that the cooling by the cooling fluid flowing in the inside of the transport pipe can be reduced in the gap. "
It is characterized by that.
[0016]
Further, claim 2 of the present invention is
“A cylindrical body whose outer surface is in contact with the sheet to be cooled and a hollow support shaft protruding from a face plate that closes both ends of the cylindrical body, and the inside of the cylindrical body is filled with a working fluid that repeats evaporation and condensation. The cooling fluid inlet chamber from the one hollow support shaft is provided at one end, and the cooling fluid outlet chamber to the other hollow support shaft is provided at the other end, and the cooling flows through the interior from the inlet chamber to the outlet chamber. A rotary cooling roller provided with an indirect heat exchange type heat transfer body configured to indirectly cool the working fluid with a fluid;
Between the outer periphery of the inlet chamber and the outlet chamber for the cooling fluid and the inner periphery of the pair of cylinders, a gap portion is provided so as to introduce the working fluid into the gap portion. The working fluid introduced into the gap is configured to be in direct contact with the entire surface of the double-sided plate, and a cooling fluid transport pipe is connected to the outer peripheral surface of the transport pipe in the hollow support shafts. Between the inner peripheral surface of the hollow support shaft, the gap and the inside of the transport pipe are respectively inserted so as to form a non-communication gap over the entire length of the hollow support shaft. Cooling by the cooling fluid flowing in the transport pipe can be reduced at the gap. "
It is characterized by that.
[0017]
Furthermore, claim 3 of the present invention provides
“In the claim 1 or 2, the gap is filled with a heat insulating material.”
It is characterized by that.
[0018]
[Operation and effect of the invention]
According to the first aspect of the present invention, a gap is formed between at least the outer circumference of the inlet chamber and the inner circumference of the cylindrical body, and the working fluid is placed in the gap. As a result of the provision, the non-contact outer peripheral surface portion on the inlet chamber side with respect to the cooling fluid out of the non-contact outer peripheral surface portion with respect to the sheet to be cooled at both ends of the cylindrical body is a gap in the outer periphery of the inlet chamber. Due to the presence of the portion, the working fluid is cooled by repeating evaporation and condensation in the gap portion without being directly cooled by the cooling fluid in the inlet chamber. Since the surface temperature in the cylinder is close to the surface temperature of the outer peripheral surface of the cylindrical body where the sheet to be cooled contacts, It can be reliably reduced to condensation on the surface of the portion of the non-contact outer peripheral surface on the side is generated. Of course, by applying the configuration of claim 1 also to the outlet chamber side with respect to the cooling fluid, it is possible to reliably reduce the occurrence of dew condensation on both non-contact outer peripheral surface portions at both ends of the cylindrical body.
[0019]
In addition, as described in claim 1, since the gap is configured so that the working fluid introduced into the gap directly contacts the entire surface of the face plate , the heat of the cylindrical body The heat transfer from the cylindrical body to the cooling fluid via the face plate is caused by contact of the working fluid flowing into the gap with the face plate. Since it can be reduced, it is possible to further promote the above-described effects and the reduction of condensation on the surface of the non-contact outer peripheral surface on the inlet chamber side with respect to the cooling fluid.
In addition, according to a first aspect of the present invention, a cooling fluid transport pipe is provided between at least one of the hollow support shafts on the inlet chamber side, and an outer peripheral surface of the transport pipe and an inner peripheral surface of the hollow support shaft. It is inserted between the gap and the transport pipe so as to form a non-communication gap over the entire length of the hollow support shaft, and the hollow support shaft is cooled by the cooling fluid flowing in the transport pipe inside. By being configured so that the clearance can be reduced at the gap, it is possible to reduce that the hollow support shaft on the inlet chamber side of the cooling fluid is cooled by the cooling fluid flowing through the inside, and the hollow support shaft on the inlet chamber side can be reduced. Since the temperature can be prevented from dropping to the temperature of the cooling fluid, it is possible to reliably reduce the occurrence of condensation on the surface of the hollow support shaft.
[0020]
Next, Claim 2 is a case where the description of Claim 1 is applied to both ends of the rotary cooling roller. According to this, in both of the non-contact outer peripheral surface portions at both ends of the cylindrical body. It is possible to reliably reduce the occurrence of condensation and to reliably reduce the occurrence of condensation on both hollow support shafts.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0022]
3 to 5 show a first embodiment.
[0023]
The rotary cooling roller 40 in the first embodiment includes a cylindrical body 21 in which a sheet to be cooled such as the raw paper 2 shown in FIG. 1 contacts the outer peripheral surface. The face plates 22 and 23 are fixed so as to seal the inside, and the inside of the cylindrical body 21 is filled with a working fluid that repeats evaporation and condensation, such as naphthalene or quinoline.
[0024]
At the center of the double-sided plates 22 and 23, hollow support shafts 24 and 25 for both ends of the cylindrical body 21 are fixed so as to protrude outward and inward through the double-sided plates 22 and 23. Journal portions 24 ′ and 25 ′ for rotatably supporting both ends of the cylindrical body 21 are provided at portions of the hollow support shafts 24 and 25 that protrude outward from the face plates 22 and 23.
[0025]
In the present embodiment, the hollow support shafts 24 and 25 are connected to a single linear shaft.
[0026]
The cylindrical body 21 has an inlet chamber 26 for cooling fluid from the one hollow support shaft 24 at one end and an outlet chamber 27 for the cooling fluid to the other hollow support shaft 25 at the other end. An indirect heat exchange type heat transfer body 28 is provided in which the working fluid is indirectly cooled by the cooling fluid flowing from the inlet chamber 26 to the outlet chamber 27.
[0027]
That is, one of the hollow support shafts 24 and 25 has the inlet chamber 26 formed at the projecting end 24 ″ into the cylindrical body 21, while the other hollow support shaft 24. 25, the outlet chamber 27 is formed at the protruding end 25 ″ into the cylindrical body 21, and the indirect heat exchange type heat transfer body is provided between the inlet chamber 26 and the outlet chamber 27. A large number of heat transfer tubes 28 'as 28 are mounted so as to be arranged along a concentric circle.
[0028]
The inlet chamber 26 and the outlet chamber 27 are made smaller in diameter than the inner diameter of the cylindrical body 21, and the inlet chamber 26 and the outlet chamber 27 are made of face plates 22 and 23 that close both ends of the cylindrical body 21. By being positioned inwardly at an appropriate distance L, between the outer periphery of the inlet chamber 26 and the outlet chamber 27 and the inner periphery of the cylindrical body 21, the periphery of the inlet chamber 26 and the outlet chamber 27. Are formed so that the gaps 29, 30 reach the inner surfaces of the face plates 22, 23, and the cylindrical body is also formed in the gaps 29, 30. The working fluid filled in 21 is introduced so as to directly contact the entire surface of the face plates 22 and 23.
[0029]
A transport pipe 31 for introducing a cooling fluid such as cooling water into the entrance chamber 26 is provided inside the one hollow support shaft 24 between the outer periphery of the transport pipe 31 and the inner surface of the hollow support shaft 24. In addition, the gap 29 and the inside of the transport pipe 31 are inserted so as to form a gap 32 that is configured not to communicate with the entire length of the hollow support shaft 24, and the hollow support shaft 24 is inside the transport pipe 31 inside thereof. In order to discharge the cooling fluid such as cooling water in the outlet chamber 27 to the inside of the other hollow support shaft 25 while being configured to be reduced by the gap 32. A gap formed between the outer periphery of the transport pipe 33 and the inner surface of the hollow support shaft 25 and the gap 30 and the interior of the transport pipe 33 so as not to communicate with each other over the entire length of the hollow support shaft 25. 34 to form Insert and constitutes said hollow support shaft 25 is cooled by the cooling fluid flowing through the interior of the transport tube 33 such that its can be reduced by the gap 34. An O-ring 35 for sealing is attached to the end portions of the gaps 32 and 34.
[0030]
In this configuration, when the working fluid filled in the cylindrical body 21 comes into contact with the inner surface of the cylindrical body 21, the working fluid evaporates due to the heat from the sheet to be cooled that is in contact with the outer peripheral surface of the cylindrical body 21. The sheet to be cooled is cooled by repeatedly cooling and condensing upon contact with 28 ', liquefying, reaching the inner surface of the cylindrical body 21 and contacting it.
[0031]
In this case, gaps 29 and 30 are formed between the outer periphery of the inlet chamber 26 and the outlet chamber 27 at one end of each heat transfer tube 28 ′ and the inner periphery of the cylindrical body 21, and the working fluid is By repeating evaporation and condensation in the gaps 29 and 30 as well, portions of the non-contact outer peripheral surface with respect to the sheet to be cooled at both ends of the cylindrical body 21 become the cooling fluid in the inlet chamber 26 and the outlet chamber 27. Since it is cooled by the working fluid without being directly cooled by the cooling fluid in the inside, the surface temperature of the non-contact outer circumferential surface portion at both ends is set to the temperature of the outer circumferential surface of the cylindrical body 21. Of these, it is possible to approach the surface temperature at the portion where the sheet to be cooled comes into contact.
[0032]
In addition, the working fluid that repeats evaporation and condensation in the gaps 29 and 30 directly contacts the entire surfaces of the face plates 22 and 23 that seal both ends of the cylindrical body 21, thereby causing the face plates 22 and 23. Therefore, the surface temperature of the non-contact outer peripheral surface portion at both ends can be made closer to the surface temperature of the portion in contact with the sheet to be cooled.
[0033]
Furthermore, the cooling fluid flowing into the inlet chamber 26 and the cooling fluid flowing out from the outlet chamber 27 are placed between the hollow support shafts 24 and 25 and the inner surfaces of the hollow support shafts 24 and 25. The hollow support shafts 24 and 25 are cooled by the cooling fluid flowing in the hollow support shafts 24 and 25 by flowing in the transport pipes 31 and 33 inserted so as to form gaps 32 and 34 over the entire length of the hollow support shafts 24 and 25. Since this can be reduced by the presence of the gaps 32 and 34, the temperature of the hollow support shafts 24 and 25 can be prevented from dropping to the temperature of the cooling fluid.
[0034]
The gaps 32 and 34 may be filled with a heat insulating material such as glass wool.
[0035]
Next, FIG. 6 shows a second embodiment.
[0036]
As in the first embodiment, the rotary cooling roller 20a in the second embodiment includes a cylindrical body 21a in which the sheet to be cooled contacts the outer peripheral surface. Hollow support shafts 24a and 25a are fixed to the center of the face plates 22a and 23a fixed so as to seal the inside so as to protrude outward and inward through the double-sided plates 22 and 23, and The cylindrical body 21a is filled with a working fluid that repeats evaporation and condensation, such as naphthalene or quinoline.
[0037]
Further, inside the cylindrical body 21a, the cooling fluid from the one hollow support shaft 24a is provided at one end between the projecting ends 24a "and 25a" of the hollow support shafts 24a and 25a into the cylindrical body 21a. The other end of the inlet chamber 26a is provided with an outlet chamber 27a for the cooling fluid to the other hollow support shaft 25a, and the inside of the working fluid is indirectly cooled by the cooling fluid flowing from the inlet chamber 26a to the outlet chamber 27a. An indirect heat exchange type heat transfer body 28a is provided.
[0038]
In the second embodiment, the indirect heat exchange type heat transfer body 28a is formed by an outer pipe 28a 'and an inner pipe 28a "inserted therein to form a cooling fluid flow passage 36 therebetween. The configuration is as follows.
[0039]
Also in the rotary cooling roller 20a of the second embodiment, the inlet chamber 26a and the outlet chamber 27a are made smaller than the inner diameter D0 of the cylindrical body 21a, as in the first embodiment. The inlet chamber 26a and the outlet chamber 27a are positioned at positions appropriately spaced inward from the face plates 22a and 23a that close both ends of the cylindrical body 21a by an appropriate distance L. Between the outer periphery of the cylindrical body 21a and the inner periphery of the cylindrical body 21a, the gaps 29a and 30a are formed in an annular shape so as to surround the inlet chamber 26a and the outlet chamber 27a. , and formed so as to reach the inner surface of 23a, the cavity portion 29a, even in 30a, the working fluid filled in the cylindrical body 21a is the surface plate 22a, 23a A configuration to introduce to come into direct contact with the entire surface.
[0040]
In addition, a transport pipe 31a for introducing a cooling fluid such as cooling water into the inlet chamber 26a is provided inside the one hollow support shaft 24a, and the outer periphery of the transport pipe 31a and the hollow support shaft 24a. The gap 29a and the inside of the transport pipe 31a are inserted so as to form a gap 32a that is not communicated with the entire length of the hollow support shaft 24a. While cooling by the cooling fluid flowing in the transport pipe 31a is reduced by the gap 32a, cooling of the cooling water or the like in the outlet chamber 27a is provided inside the other hollow support shaft 25a. the transport pipe 33a for discharging the fluid, between the outer and inner surface of the hollow support shaft 25a of the transport tube 33a, a hollow support shaft 25a and the cavity 30a and the transport pipe 33a Insert to form a gap 34a that is configured to non-communicating over the entire length, said that the hollow support shaft 25a is cooled by the cooling fluid flowing inside the transport pipe 33a thereof so as to be reduced by the gap 34a Constitute.
[0041]
Also in the second embodiment, the working fluid repeatedly evaporates and condenses in the voids 29a and 30a surrounding the outer circumferences of the inlet chamber 26a and the outlet chamber 27, so that the cylindrical body 21a can enter the inlet chamber. While the direct heat transfer to the cooling fluid in the inner space 26a and the outlet chamber 27a can be reduced, the gaps 32, 34 can be understood that the hollow support shafts 24, 25 are cooled by the cooling fluid flowing through the inner shafts. Therefore, the same effect as in the first embodiment can be obtained.
[0042]
Also in the second embodiment, the gaps 32a and 34a between the hollow support shafts 24 and 25 and the transport pipes 31a and 33a inserted therein are filled with a heat insulating material such as glass wool. It may be configured to do. In the second embodiment, the spiral protrusion 37 is provided on the outer peripheral surface of the inner tube 28a ″ in the heat transfer body 28a, while the fin 38 is provided on the outer peripheral surface of the outer tube 28a ′. , It is configured to improve heat transfer.
[0043]
Each of the above-described embodiments includes the hollow portions 29, 29a, 30, and 30a for both the inlet chambers 26 and 26a and the outlet chambers 27 and 27a, and the hollow portions. In the case where the transport pipes 31, 31a, 33, 33a are inserted into the support shafts 24, 24a, 25, 25a, the cylindrical bodies 21, 21a and the hollow support shafts 24, 24a, 25, 25a are inserted. Condensation that occurs at the inlet mainly occurs at the inlet side where the temperature of the cooling fluid is low. Therefore, when the condensation occurs only at the inlet side, the gaps 29, 29a and the transport pipe 31 are only at the inlet side. , 31a may be provided.
[0044]
In addition, when the temperature difference between the inlet side and the outlet side in the cooling fluid is small and there is a possibility that condensation will occur on both the inlet side and the outlet side, as described in the above embodiments. Therefore, it may be configured to apply to both ends.
[Brief description of the drawings]
FIG. 1 is a schematic view of an apparatus for producing laminated laminated paper.
FIG. 2 is a longitudinal sectional front view showing a conventional rotary cooling roller.
FIG. 3 is a longitudinal front view showing the rotary cooling roller according to the first embodiment of the present invention.
4 is a cross-sectional view taken along the line IV-IV in FIG. 3;
FIG. 5 is an enlarged view of a main part of FIG. 3;
FIG. 6 is a longitudinal front view showing a rotary cooling roller according to a second embodiment of the present invention.
[Explanation of symbols]
40, 40a Rotary cooling roller 21, 21a Cylindrical body 22, 22a, 23, 23a Face plate 24, 24a, 25, 25a Hollow support shaft 26, 26a Inlet chamber 27, 27a Outlet chamber 28, 28a Heat transfer bodies 29, 29a, 30, 30a Cavity 31, 31a, 33, 33a Transport pipe 32, 32a, 34, 34a Clearance

Claims

A cylinder having an outer peripheral surface in contact with the sheet to be cooled, and a hollow support shaft protruding from a face plate that closes both ends of the cylinder, and the inside of the cylinder is filled with a working fluid that repeats evaporation and condensation; The cooling fluid has an inlet chamber for cooling fluid from the one hollow support shaft at one end and an outlet chamber for the cooling fluid to the other hollow support shaft at the other end, and flows inside from the inlet chamber to the outlet chamber. A rotary cooling roller provided with an indirect heat exchange type heat transfer body that indirectly cools the working fluid at
A gap is provided between at least the outer circumference of the inlet chamber and the inner circumference of the cylindrical body of the inlet chamber and the outlet chamber for the cooling fluid so as to introduce the working fluid into the gap. The working fluid introduced into the gap is in direct contact with the entire surface of the face plate, and further, in the hollow support shaft at least on the inlet chamber side of the both hollow support shafts, A cooling fluid transport pipe is formed between the outer peripheral surface of the transport pipe and the inner peripheral surface of the hollow support shaft so as to form a non-communication gap between the gap and the transport pipe over the entire length of the hollow support shaft. A structure of a rotary cooling roller which is configured to be inserted and can be reduced by the gap so that the hollow support shaft is cooled by a cooling fluid flowing in a transport pipe inside thereof.

A cylinder having an outer peripheral surface in contact with the sheet to be cooled, and a hollow support shaft protruding from a face plate that closes both ends of the cylinder, and the inside of the cylinder is filled with a working fluid that repeats evaporation and condensation; The cooling fluid has an inlet chamber for cooling fluid from the one hollow support shaft at one end and an outlet chamber for the cooling fluid to the other hollow support shaft at the other end, and flows inside from the inlet chamber to the outlet chamber. A rotary cooling roller provided with an indirect heat exchange type heat transfer body that indirectly cools the working fluid at
Between the outer periphery of the inlet chamber and the outlet chamber for the cooling fluid and the inner periphery of the pair of cylinders, a gap portion is provided so as to introduce the working fluid into the gap portion. The working fluid introduced into the gap is configured to be in direct contact with the entire surface of the double-sided plate, and a cooling fluid transport pipe is connected to the outer peripheral surface of the transport pipe in the hollow support shafts. Between the inner peripheral surface of the hollow support shaft, the gap and the inside of the transport pipe are respectively inserted so as to form a non-communication gap over the entire length of the hollow support shaft. A structure of a rotary cooling roller characterized in that cooling by a cooling fluid flowing in a transport pipe can be reduced in the gap.

3. The structure of the rotary cooling roller according to claim 1, wherein a heat insulating material is filled in the gap.